Table 1.

DDM parameters averaged across participants

DDM parameters	a	Ter	z/a	s1	s2	s3	rS	rM	rL	sz	st	η	χ2
Dots	0.12	387	0.49	0.50	0.33	0.10	−0.08	0.01	0.09	0.04	162	0.11	174
Lines	0.12	357	0.53	0.52	0.33	0.11	−0.16	−0.05	0.06	0.03	164	0.12	159

For DDM parameters: a, boundary separation (response caution); Ter, nondecision time; z/a, starting point of evidence accumulation (values >0.5 indicate bias for big response); s₁, stimulus size for items farthest from middle of perceptual space (1 and 6); s₂, stimulus size for items medium distance from middle of perceptual space (2 and 5); s₃, stimulus size for items nearest middle of perceptual space (3 and 4); r_S, value for small decision criterion; r_M, value for medium decision criterion; r_L, value for large decision criterion; s_z, across-trial variability in starting point; s_t, across-trial variability in nondecision time; η, across-trial variability in drift rate; χ², best fitting χ² value. Note: Table 1 is related to Figure 4.